World's best island is ...

Ambergris Caye, in Belize -- known for its beautiful beaches, limestone caves and tropical rainforest -- won the TripAdvisor top spot for the second year running.

Tranquil "Provo," no. 2 on the list, offers scuba diving, horseback riding and plenty of doing nothing.

Reef-diving in a turquoise lagoon is among the top draws on Bora Bora, no. 3 among the world's top 10 islands.

A little removed from the other, balmy inclusions in the island top 10 is this Scottish entrant at no. 5. A resident says its white sand and turquoise water "make it look Caribbean."

Sixth best island in the world, according to TripAdvisor, is Naxos, legendary home of Zeus.

Known for its huge, humanoid stone sculptures is Chile's Easter Island, ranking ninth.

Horses run wild on Chincoteague, second among best U.S. islands.

A renowned island beauty, Maui isn't too surprising an inclusion among best U.S. islands, at no. 5.

This Cycladic island, sixth among the European top 10, is where the Venus de Milo statue was discovered.

Poets and painters have been extolling the beauty of Capri, eighth top European island, for centuries -- the TripAdvisor ranking is only the last in a long list of compliments.

• Ambergris Caye wins TripAdvisor best island award for second year running


• Scotland's Harris and Lewis is new entrant at no. 5


• Chincoteague, with its wild ponies, and San Juan island among U.S. top 10

(CNN) -- Ambergris Caye, in Belize, has held on to the title of world's No. 1 island for the second year running in awards by the travel review site TripAdvisor.

The island is acclaimed not only for its beaches but for its coral reef -- the second largest in the world -- limestone caves, and tracts of tropical rainforest dotted with waterfalls.

Islands in Polynesia (Bora Bora), Greece (Naxos) and Thailand (Ko Tao), as well as Marco Island, off Florida, were other winners in the top 10 global list.

Perhaps less obvious postcard-rack material, the Scottish island of Harris and Lewis ranked no. 5 worldwide and top among European islands.

Alastair Lockett, from the Hebridean island's tourist board, was not at all surprised by the accolade.

With its "pure white sand" and "turquoise water," Harris and Lewis -- which ranked nowhere in last year's top 10 -- actually "looks Caribbean," he told CNN.

Its "accessible remoteness" and "sense of space" were what drew people to the island, he said.

Chincoteague: wild horses could drag you there.

Best U.S. islands

Among the 10 best islands in the United States -- aside from Marco Island, at No. 1 -- were Chincoteague, in Virginia, known for its wild ponies, and San Juan island, in Washington, acclaimed for its orca-sighting.

Mauii, a beautiful possible shoe-in from Hawaii, was another U.S. winner, as was the "golfer's paradise" of Hilton Head, South Carolina.

Trailing in the wake of Lewis and Harris among 10 best European islands was Gozo, Malta; Santorini and Cephalonia, among a clutch of Greek islands; and Mull and Mainland, the largest of the Orkney Islands -- making up a Scottish trio.

TripAdvisor's Travelers' Choice Island awards are based on the most highly rated hotels, restaurants and attractions listed for each island on the website during a 12-month period.

MORE: 7 secret Caribbean islands

The top 10 islands in the world were:

1. Ambergris Caye, Belize

2. Providenciales, Turks and Caicos

3. Bora Bora, French Polynesia

4. Marco Island, Florida

5. Lewis and Harris, Scotland, United Kingdom

6. Naxos, Greece

7. Aitutaki, Cook Islands

8. Nosy Be, Madagascar

9. Easter Island, Chile

10. Ko Tao, Thailand

Top 10 islands in the U.S.

1. Marco Island, Florida

2. Chincoteague Island, Virginia

3. Anna Maria Island, Florida

4. San Juan Island, Washington

5. Maui, Hawaii

6. Kauai, Hawaii

7. Island of Hawaii, Hawaii

8. Nantucket, Massachusetts

9. Hilton Head, South Carolina

10. Key West, Florida

Top 10 Islands in Europe

1. Lewis and Harris, Scotland, United Kingdom

2. Naxos, Greece

3. Gozo, Malta

4. Mainland, Orkney Islands, Scotland, United Kingdom

5. Milos, Greece

6. Cephalonia, Greece

7. Santorini, Greece

8. Capri, Italy

9. Isle of Mull, Scotland, United Kingdom

10. Paros, Greece